An arthropod is a member of the phylum Arthropoda, the largest phylum in the animal kingdom, encompassing about 84 percent of all known animal species. This diverse group includes insects, arachnids (such as spiders and scorpions), crustaceans (like crabs and lobsters), and myriapods (centipedes and millipedes). Arthropods inhabit nearly every environment on Earth, from deep oceans to high mountains.
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